FAIR VALUE MEASUREMENTS (Details - Assets and Liabilities Measured at Fair Value on a Recurring Basis) - USD ($) $ in Millions		Jun. 30, 2021	Dec. 31, 2020
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	[1]	$ 273,070	$ 271,496
Other bond securities	[1]	4,866	5,291
Equity securities	[1]	1,079	1,056
Other invested assets		9,580	8,422
Derivative Assets, Fair Value, Gross		5,586	6,805
Derivative assets, Counterparty netting		(2,833)	(3,812)
Derivative assets, Cash collateral		(1,721)	(2,219)
Derivative assets		1,032	774
Short-term investments		5,523	5,968
Separate account assets, at fair value		107,306	100,290
Fair Value, Liabilities Measured on Recurring Basis
Policyholder contract deposits, portion measured at fair value		9,020	9,798
Derivative Liabilities, Fair Value, Gross		4,765	5,822
Derivative liabilities, Counterparty netting		(2,833)	(3,812)
Derivative liabilities, Cash collateral		(1,201)	(1,441)
Derivative liabilities		731	569
Fortitude Re funds withheld payable		41,403	43,060
Other liabilities		741	570
Long-term debt		1,974	2,097
Fair Value Using Net Asset Value Per Share or its equivalent		7,378	6,493
Level 1
Fair Value, Liabilities Measured on Recurring Basis
Fortitude Re funds withheld payable		0	0
Level 2
Fair Value, Liabilities Measured on Recurring Basis
Fortitude Re funds withheld payable		0	0
Level 3
Fair Value, Liabilities Measured on Recurring Basis
Fortitude Re funds withheld payable		36,086	37,018
Recurring Basis
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale		273,070	271,496
Other bond securities		4,866	5,291
Equity securities		1,079	1,056
Other invested assets		2,202	1,929
Derivative assets, Counterparty netting		(2,833)	(3,812)
Derivative assets, Cash collateral		(1,721)	(2,219)
Derivative assets, Counterparty netting and cash collateral		(4,554)	(6,031)
Derivative assets		1,032	774
Short-term investments		5,523	5,968
Other assets		113	113
Separate account assets, at fair value		107,306	100,290
Fair value assets measured on recurring basis, total		395,191	386,917
Fair Value, Liabilities Measured on Recurring Basis
Policyholder contract deposits, portion measured at fair value		9,020	9,798
Derivative liabilities, Counterparty netting		(2,833)	(3,812)
Derivative liabilities, Cash collateral		(1,201)	(1,441)
Derivative liabilities, Counterparty netting and cash collateral		(4,034)	(5,253)
Derivative liabilities		731	569
Fortitude Re funds withheld payable		5,317	6,042
Other liabilities		10	1
Long-term debt		1,974	2,097
Fair value liabilities measured on recurring basis, total		17,052	18,507
Recurring Basis | Interest rate contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross		3,678	4,637
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross		3,880	4,436
Recurring Basis | Foreign exchange contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross		1,157	1,022
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross		747	1,090
Recurring Basis | Equity contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross		731	1,130
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross		72	223
Recurring Basis | Commodity contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross		6
Recurring Basis | Credit contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross		1	2
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross		63	67
Recurring Basis | Other contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross		13	14
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross		3	6
Recurring Basis | U.S. government and government sponsored entities
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale		4,501	4,126
Other bond securities		1,778	1,845
Recurring Basis | Obligations of states, municipalities and political subdivisions
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale		15,179	16,124
Recurring Basis | Non-U.S. governments
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale		16,021	15,345
Other bond securities		0	0
Recurring Basis | Corporate debt
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale		175,553	169,298
Other bond securities		12	12
Recurring Basis | Residential mortgage-backed securities (RMBS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale		28,584	31,465
Other bond securities		334	429
Recurring Basis | Commercial mortgage-backed securities (CMBS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale		15,464	16,133
Other bond securities		300	320
Recurring Basis | Collateralized Debt Obligations/Asset Backed Securities (CDO/ABS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale		17,768	19,005
Other bond securities		2,442	2,685
Recurring Basis | Level 1
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale		55	101
Other bond securities		0	0
Equity securities		1,029	929
Other invested assets		0	0
Derivative Assets, Fair Value, Gross		7	9
Short-term investments		2,839	2,379
Other assets		0	0
Separate account assets, at fair value		103,402	96,560
Fair value assets measured on recurring basis, total		107,332	99,978
Fair Value, Liabilities Measured on Recurring Basis
Policyholder contract deposits, portion measured at fair value		0	0
Derivative Liabilities, Fair Value, Gross		6	15
Fortitude Re funds withheld payable		0	0
Other liabilities		0	0
Long-term debt		0	0
Fair value liabilities measured on recurring basis, total		6	15
Recurring Basis | Level 1 | Interest rate contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross		0	0
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross		2	1
Recurring Basis | Level 1 | Foreign exchange contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross		0	0
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross		0	0
Recurring Basis | Level 1 | Equity contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross		7	9
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross		4	14
Recurring Basis | Level 1 | Commodity contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross		0
Recurring Basis | Level 1 | Credit contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross		0	0
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross		0	0
Recurring Basis | Level 1 | Other contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross		0	0
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross		0	0
Recurring Basis | Level 1 | U.S. government and government sponsored entities
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale		0	73
Other bond securities		0	0
Recurring Basis | Level 1 | Obligations of states, municipalities and political subdivisions
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale		0	0
Recurring Basis | Level 1 | Non-U.S. governments
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale		55	28
Other bond securities		0	0
Recurring Basis | Level 1 | Corporate debt
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale		0	0
Other bond securities		0	0
Recurring Basis | Level 1 | Residential mortgage-backed securities (RMBS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale		0	0
Other bond securities		0	0
Recurring Basis | Level 1 | Commercial mortgage-backed securities (CMBS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale		0	0
Other bond securities		0	0
Recurring Basis | Level 1 | Collateralized Debt Obligations/Asset Backed Securities (CDO/ABS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale		0	0
Other bond securities		0	0
Recurring Basis | Level 2
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale		246,808	244,506
Other bond securities		2,428	2,593
Equity securities		46	76
Other invested assets		103	102
Derivative Assets, Fair Value, Gross		5,195	6,580
Short-term investments		2,684	3,589
Other assets		0	0
Separate account assets, at fair value		3,904	3,730
Fair value assets measured on recurring basis, total		261,168	261,176
Fair Value, Liabilities Measured on Recurring Basis
Policyholder contract deposits, portion measured at fair value		0	0
Derivative Liabilities, Fair Value, Gross		4,701	5,710
Fortitude Re funds withheld payable		0	0
Other liabilities		10	1
Long-term debt		1,974	2,097
Fair value liabilities measured on recurring basis, total		6,685	7,808
Recurring Basis | Level 2 | Interest rate contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross		3,677	4,637
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross		3,878	4,435
Recurring Basis | Level 2 | Foreign exchange contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross		1,156	1,020
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross		747	1,090
Recurring Basis | Level 2 | Equity contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross		356	923
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross		57	162
Recurring Basis | Level 2 | Commodity contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross		6
Recurring Basis | Level 2 | Credit contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross		0	0
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross		19	23
Recurring Basis | Level 2 | Other contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross		0	0
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross		0	0
Recurring Basis | Level 2 | U.S. government and government sponsored entities
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale		4,501	4,053
Other bond securities		1,778	1,845
Recurring Basis | Level 2 | Obligations of states, municipalities and political subdivisions
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale		13,240	14,019
Recurring Basis | Level 2 | Non-U.S. governments
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale		15,956	15,312
Other bond securities		0	0
Recurring Basis | Level 2 | Corporate debt
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale		172,780	166,949
Other bond securities		12	12
Recurring Basis | Level 2 | Residential mortgage-backed securities (RMBS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale		17,499	19,771
Other bond securities		221	290
Recurring Basis | Level 2 | Commercial mortgage-backed securities (CMBS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale		14,382	15,211
Other bond securities		254	273
Recurring Basis | Level 2 | Collateralized Debt Obligations/Asset Backed Securities (CDO/ABS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale		8,450	9,191
Other bond securities		163	173
Recurring Basis | Level 3
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale		26,207	26,889
Other bond securities		2,438	2,698
Equity securities		4	51
Other invested assets		2,099	1,827
Derivative Assets, Fair Value, Gross		384	216
Short-term investments		0	0
Other assets		113	113
Separate account assets, at fair value		0	0
Fair value assets measured on recurring basis, total		31,245	31,794
Fair Value, Liabilities Measured on Recurring Basis
Policyholder contract deposits, portion measured at fair value		9,020	9,798
Derivative Liabilities, Fair Value, Gross		58	97
Fortitude Re funds withheld payable		5,317	6,042
Other liabilities		0	0
Long-term debt		0	0
Fair value liabilities measured on recurring basis, total		14,395	15,937
Recurring Basis | Level 3 | Interest rate contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross		1	0
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross		0	0
Recurring Basis | Level 3 | Foreign exchange contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross		1	2
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross		0	0
Recurring Basis | Level 3 | Equity contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross		368	198
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross		11	47
Recurring Basis | Level 3 | Commodity contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross		0
Recurring Basis | Level 3 | Credit contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross		1	2
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross		44	44
Recurring Basis | Level 3 | Other contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross		13	14
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross		3	6
Recurring Basis | Level 3 | U.S. government and government sponsored entities
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale		0	0
Other bond securities		0	0
Recurring Basis | Level 3 | Obligations of states, municipalities and political subdivisions
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale		1,939	2,105
Recurring Basis | Level 3 | Non-U.S. governments
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale		10	5
Other bond securities		0	0
Recurring Basis | Level 3 | Corporate debt
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale		2,773	2,349
Other bond securities		0	0
Recurring Basis | Level 3 | Residential mortgage-backed securities (RMBS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale		11,085	11,694
Other bond securities		113	139
Recurring Basis | Level 3 | Commercial mortgage-backed securities (CMBS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale		1,082	922
Other bond securities		46	47
Recurring Basis | Level 3 | Collateralized Debt Obligations/Asset Backed Securities (CDO/ABS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale		9,318	9,814
Other bond securities		$ 2,279	$ 2,512

[1] See Note 8 for details of balances associated with variable interest entities.